Substrate control of anisotropic resistivity in heteroepitaxial nanostructured arrays of cryptomelane manganese oxide on strontium titanate

Anais E Espinal; Yonggao Yan; Lichun Zhang; Laura Espinal; Aimee Morey; Barrett O Wells; Mark Aindow; Steven L Suib

doi:10.1002/smll.201300713

Substrate control of anisotropic resistivity in heteroepitaxial nanostructured arrays of cryptomelane manganese oxide on strontium titanate

Small. 2014 Jan 15;10(1):66-72. doi: 10.1002/smll.201300713. Epub 2013 Jul 29.

Authors

Anais E Espinal¹, Yonggao Yan, Lichun Zhang, Laura Espinal, Aimee Morey, Barrett O Wells, Mark Aindow, Steven L Suib

Affiliation

¹ Institute of Materials Science, University of Connecticut, Storrs, CT, USA.

PMID: 23894065
DOI: 10.1002/smll.201300713

Abstract

Resistivity and resistance measurements have been carried out for thin films of cryptomelane-type manganese oxide (OMS-2) grown onto (001), (110), and (111)STO single crystals substrates via pulsed laser deposition. While the symmetries of the (001) and (111)STO substrate surfaces give deposits consisting of multiple nanofiber arrays with isotropic in-plane resistivities, only a single nanofiber array is formed on (110)STO giving highly anisotropic electrical properties with very low resistivity values measured parallel to the fibers and similar to the lowest value ever reported.

Keywords: cryptomelane; heteroepitaxial growth; resistance; resistivity.

Publication types

Research Support, U.S. Gov't, Non-P.H.S.